Chen T.-PLin J.-XLin C.-CLin C.-YKe W.-CWang D.-YHsu H.-SChen C.-CChen C.-W.CHUN-WEI CHEN2021-08-052021-08-05202119448244https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102421307&doi=10.1021%2facsami.0c20863&partnerID=40&md5=b398dc2db2552a744980fdfd18dbe720https://scholars.lib.ntu.edu.tw/handle/123456789/576906This work demonstrates the strong excitonic magneto-optic (MO) effects of magnetic circular dichroism (MCD) and Faraday rotation (FR) in nonmagnetic two-dimensional (2D) organic-inorganic hybrid Ruddlesden-Popper perovskites (RPPs) at room temperature. Due to their strong and sharp excitonic absorption as a result of unique quantum well structures of 2D RPPs, sizeable linear excitonic MO effects of MCD and FR can be observed at room temperature under a low magnetic field (<1 T) compared with their three-dimensional counterpart. In addition, since the band gaps of 2D organic-inorganic hybrid perovskites can be manipulated either by changing the number n of inorganic octahedral slabs per unit cell or through halide engineering, linear excitonic MO effects of 2D-RPPs can be observed through the broadband spectral ranges of visible light. Our result may pave the way for the promising research field of MO and magneto-optoelectronic applications based on 2D organic-inorganic hybrid perovskites with facile solution processes. ?Cell engineering; Dichroism; Energy gap; Magnetic field effects; Perovskite; Semiconductor quantum wells; Excitonic absorption; Low magnetic fields; Magnetic circular dichroisms; Magneto optic effect; Optoelectronic applications; Organic-inorganic hybrid; Quantum well structures; Two Dimensional (2 D); organic-inorganic materialsjournal article10.1021/acsami.0c20863335994862-s2.0-85102421307